I think you should remember that the wavelength for visible light is between 400 and 700 nanometers and probably know which ones have short wavelengths (like gamma or x rays) and which ones have long wavelengths (like radio or microwaves)

I think you should know which wavelengths correspond to visible light (400 nm -700 nm) and know the order of smallest to longest wavelengths (gamma ray, x-ray, ultraviolet, visible, infrared, microwave, and radio wave)

I believe that it will be important to know the order of the regions of the electromagnetic spectrum, as I feel that questions on ordering waves based on frequency, wavelength, or energy will pop up on the test

During my discussion, the TA said that we should have the information required to find the n level. If you have done the A15 exercise in the book though, they says that the wavelenght studied is from the UV spectrum and this should be enought for you to state that it's from the lyman serie with n = 1